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Single-player games like Zero Stress King: Idle Defense

Below are 10 single-player Steam games similar to Zero Stress King: Idle Defense, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.

Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Zero Stress King: Idle Defense page.

Ranked picks

  1. 1
    castle idler — Steam game cover

    castle idler

    Single-player alternative to Zero Stress King: Idle Defense — playable solo, no multiplayer required. Shares Strategy and Casual with Zero Stress King: Idle Defense.

    castle idler is a short, relaxing incremental tower defense game with no waves. upgrade towers, collect coins, and unlock powerful prestige upgrades to defend your castle.

    2026StrategyCasual3.99 USDDeck PlayableSingle-playerSimilar games →
  2. 2
    All Aboard! The Train Defense Express — Steam game cover

    All Aboard! The Train Defense Express

    Single-player alternative to Zero Stress King: Idle Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Zero Stress King: Idle Defense.

    Protect the Infinite Power Generator by looping around the train tracks! Battle endless waves of enemies in this unique hybrid of auto-battler, survivor, tower defense, idle/clicker gameplay. How long can you survive?

    2025StrategyIndieSimulation4.99 USDDeck VerifiedSingle-playerSimilar games →
  3. 3
    Timber Rush — Steam game cover

    Timber Rush

    Single-player alternative to Zero Stress King: Idle Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Zero Stress King: Idle Defense.

    Timber Rush is a fast-paced incremental roguelite where every swing explodes into upgrades, chaos, and massive numbers.

    2026ActionStrategyIndie4.99 USDDeck PlayableSingle-playerSimilar games →
  4. 4
    Desktop Defender — Steam game cover

    Desktop Defender

    Single-player alternative to Zero Stress King: Idle Defense — playable solo, no multiplayer required. Shares Indie and Casual with Zero Stress King: Idle Defense.

    An idle auto-battler that sits in the corner of your screen while you do other things.

    2025IndieCasual4.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    IDLE BOSS RUSH — Steam game cover

    IDLE BOSS RUSH

    Single-player alternative to Zero Stress King: Idle Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Zero Stress King: Idle Defense.

    Slay giant bosses and turn the hollow wasteland into the almighty kingdom! Endlessly rewarding incremental game where you collect fountains of rare loot, unleash crazy combos and watch the monsters fall under your knees. Boss Rush that keeps on going when you're gone!

    2025StrategyIndieSimulation9.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Maktala: Slime Lootfest — Steam game cover

    Maktala: Slime Lootfest

    Single-player alternative to Zero Stress King: Idle Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Zero Stress King: Idle Defense.

    An incremental game where you kill hordes of slimes and use their loot to become stronger and farm them. Collect powerful loot, master skills, and uncover tons of content.

    2025ActionStrategyIndie4.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Gamblers Table — Steam game cover

    Gamblers Table

    Single-player alternative to Zero Stress King: Idle Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Zero Stress King: Idle Defense.

    Gamblers Table is an incremental game where you toss coins to earn money. Buy bigger and better coins, unlock upgrades and hire little helpers to automate the process and take care of all the busy flipping work for you. Simple. Satisfying. Strangely compelling...

    2026StrategyIndieSimulation6.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Tower Wizard — Steam game cover

    Tower Wizard

    Single-player alternative to Zero Stress King: Idle Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Zero Stress King: Idle Defense.

    Help a wizard build and upgrade a wizard tower in this incremental game! Use the tower to study magic, summon spirits, create buildings, and influence the world.

    2025StrategyIndieSimulation2.99 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    Castle Break — Steam game cover

    Castle Break

    Single-player alternative to Zero Stress King: Idle Defense — playable solo, no multiplayer required. Shares Indie and Casual with Zero Stress King: Idle Defense.

    Breakout game + physics + shooting + building. Use your mouse like in air hockey to kick enemy bombs back into the evil Black Castle! Destroy enemy towers rockets and lasers. Build your base to protect your little dudes - you need them to win

    2019ActionIndieCasual0.99 USDDeck VerifiedSingle-playerSimilar games →
  10. 10
    Zero Orders Tactics — Steam game cover

    Zero Orders Tactics

    Single-player alternative to Zero Stress King: Idle Defense — playable solo, no multiplayer required. Shares Strategy and Indie with Zero Stress King: Idle Defense.

    🌋⚔ Terraforming + Into The Breach! An experimental puzzle strategy where you are not commanding your troops - now, you are shaping the battlefield itself! Nothing is random*, everything is predictable*, and the battlefield is changing. Every turn. By you.

    2024StrategyIndieRPG3.59 USDDeck VerifiedSingle-playerSimilar games →